<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>CSS基本语法</title> 
<style>
p,h1,h2{
    color:lawngreen
}
</style>
</head>

<body>
    <p>分组选择器，段落</p>
    <p>分组选择器，标题1</p>
</body>
</html>